package com.weblearning.tliasweb.filter;

import jakarta.servlet.*;
import jakarta.servlet.annotation.WebFilter;

import java.io.IOException;

//@WebFilter(urlPatterns = "/*")
public class DemoFilter implements Filter {

    @Override //初始化方法 调用一次
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.println("init初次执行");
    }

    @Override  //拦截方法 调用多次
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.out.println("拦截到请求");
        filterChain.doFilter(servletRequest,servletResponse);
        System.out.println("后请求");

    }

    @Override  //销毁方法 调用一次
    public void destroy() {
        Filter.super.destroy();
    }
}
